This paper presents numerical stress calculation in the stationary
temperature domain for a hybride structure with fiber composite (for example,
based on the epoxy risen as matrice of prepreg) and metalic part (other part
of structure or metalic mould), as different material according to their own
thermical behaviour. The thermal stress analysis is based on the finite
element method. A sample problem involving such a composite plate and metalic
part of structure or mould at two different temperature levels, corresponding
to curing process (co-curing) and operating temperatures respectively, is
calculated and discussed. The specifics of composite are emphasized
particularly for thermal coefficients (especially shear coefficient is
different than zero, there are situations when some of coefficients could be
less then zero). This composites as generalized orthotropic material are
completelly different than isotropic material (for isotropic material shear
coefficient is always equal zero). It was pointed out also that the
calculation for the initial crack to appear in the lamellae (the most common
occurrence of cracks in the matrix) can be set with a reserve of elasticity
or without reserve.